152 MR. G. H. WAILES ON FRESHWATER RHIZOPODA 



Genus Trinema, Dujardm. 

 Trinema complanatum, Fen. 



T. enehehjs pars, Leidy, pi. 39. figs. 41, 47, 48, 61, 62, 63, 67, 68 (30). 

 Not uncommon, but generally of small size. Length 25-55 fju, 



T. enchelys, Leidy. 

 Leidy, pi. 39, pars (30). 



Not numerous, and in some localities rare. Usually 40-70 fx in length, 

 but a few individuals exceeded 100 /x. (up to 105 yu,). On pi. 39 Leidy 

 depicts three species of Trinema and Corythion duhkim, q. v. 



T. lineare, Penard. 



T. enchelys pars, Leidy, pi. 39. figs. 38, 43, 55-59, 65 (30). 



Generally numerous. Length 20-32 fi. 



Genus Corythion, Taranek. 



C/ORYTHION DUBIUM, Tardnek. 



T. enchelys pars, Leidy, pi. 39. figs. 12, 13 (30). 



Generally distributed, but not very numerous. 



Genus Sphenoderia, SMitmli. 



Sphenoderia dentata, Penard. 

 S. lenta pars, Leidy, pi. 34. fig. 40 (30). 



Numerous and above the average size. Length 50-GO /j, ; diameter 

 25-30 fi. 



S. LENTA, ScJdumh. 



Leidy, pi. 34. figs. 25-39, 41 (30). 

 Generally distributed, and in some localities numerous. Length 29-64 /x ; 

 breadth 17-50 /j, ; aperture 7-24 fx. 



S. MACROLEPIS, Leidy (30). 



Rare, but widely distributed in sphagnum. 



Length 30-32 /x. 



DisUihution. Malaga (Leidy) ; Lakehurst, N.J. ; Long Lsland, N.Y. ; 

 British Isles (3; (45) . 



S. fissirostris, Pen., was not found and has not yet been recorded from 

 America. Two of Leidy's illustrations (30. pi. 34. figs. 37, 38) may refer 

 to this species, but seem rather to represent abnormal forms of S. lenta. 



